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m68k: Add memcmp() declaration

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There is a global definition of memcmp() that gets built on m68k but is
never used and causes a warning because of the missing prototype:

    lib/string.c:671:15: error: no previous prototype for 'memcmp' [-Werror=missing-prototypes]

Add the corresponding declaration to avoid the warning.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/20230809211057.60514-2-arnd@kernel.org
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
This commit is contained in:
Arnd Bergmann 2023-08-09 23:10:50 +02:00 committed by Geert Uytterhoeven
parent 668a920208
commit 1a48e2ccd4
1 changed files with 1 additions and 0 deletions
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arch/m68k/include/asm/string.h
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@ -41,6 +41,7 @@ static inline char *strncpy(char *dest, const char *src, size_t n)
#define __HAVE_ARCH_MEMMOVE
extern void *memmove(void *, const void *, __kernel_size_t);
extern int memcmp(const void *, const void *, __kernel_size_t);
#define memcmp(d, s, n) __builtin_memcmp(d, s, n)
#define __HAVE_ARCH_MEMSET